{"product_id":"36v-battery-sy25-ii-mountain-electric-bike","title":"36V Replacement Battery for SY25-II Mountain Electric Bike","description":"\u003cp\u003e\u003cstrong\u003eChoose Your Capacity: 13Ah or 15.6Ah | A+ Grade Cells | 30A Intelligent BMS | XT60 Connector | Charger Included | 30-Day Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eChoose Your Battery Capacity\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e36V 13Ah:\u003c\/strong\u003e Daily commuting \u0026amp; casual riding — 4.3 kg\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e36V 15.6Ah:\u003c\/strong\u003e Long distance \u0026amp; demanding mountain terrain — 5.5 kg\u003c\/p\u003e\n\u003cp\u003eSelect your preferred capacity before adding to basket.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications: 36V 13Ah\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 38.4927%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"width: 61.5073%;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eCompatible Model\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eSY25-II Mountain Electric Bike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eBattery King\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e36V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eBattery Capacity\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e13Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eBMS\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e30A Intelligent Motherboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eCharging Pins\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e5 Pins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eCharger\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e48V 3A Powerful Charger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eXT60 (Default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eSingle Cell\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e2600mAh EVE A+ Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eConfiguration\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e10S 5P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e370 x 110 x 90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eBattery Type\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eLithium Ion (Li-Ion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eMotor Compatibility\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e200W · 250W · 300W · 350W · 480W · 500W · 750W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e4.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eColour\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eCertificates\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eUKCA · CE · UN38.3 · MSDS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.4927%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 61.5073%;\"\u003e30 Days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eTechnical Specifications: 36V 15.6Ah\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 38.6606%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"width: 61.3394%;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eCompatible Model\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eSY25-II Mountain Electric Bike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eBattery King\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e36V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eBattery Capacity\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e15.6Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eBMS\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e30A Intelligent Motherboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eCharging Pins\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e5 Pins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eCharger\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e48V 3A Powerful Charger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eXT60 (Default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eSingle Cell\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e2600mAh EVE A+ Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eConfiguration\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e10S 6P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e370 x 110 x 90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eBattery Type\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eLithium Ion (Li-Ion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eMotor Compatibility\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e200W · 250W · 300W · 350W · 480W · 500W · 750W · 1000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e5.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eColour\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eCertificates\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eUKCA · CE · UN38.3 · MSDS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.6606%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 61.3394%;\"\u003e30 Days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eRestore or upgrade your SY25-II Mountain Electric Bike with this high-performance 36V lithium battery from Battery King. Available in two capacity options: choose the \u003cstrong\u003e13Ah\u003c\/strong\u003e for reliable like-for-like replacement, or go for the \u003cstrong\u003e15.6Ah\u003c\/strong\u003e for significantly extended range and more confident performance on demanding mountain terrain. Built with premium A+ grade EVE cells, an intelligent 30A BMS, and supplied with an XT60 connector as standard no adapter needed for your SY25-II.\u003c\/p\u003e\n\u003ch2\u003e13Ah vs 15.6Ah: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 36V 13Ah if you:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNeed a direct like-for-like replacement for your SY25-II Mountain Electric Bike\u003c\/li\u003e\n\u003cli\u003eRide mostly on flat or moderate terrain with regular charging access\u003c\/li\u003e\n\u003cli\u003eWant a lighter battery option for your SY25-II e-bike\u003c\/li\u003e\n\u003cli\u003eDo shorter daily commutes or casual weekend rides\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 36V 15.6Ah if you:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWant more range per charge on your SY25-II Mountain Electric Bike\u003c\/li\u003e\n\u003cli\u003eTackle demanding hills, trails, and longer mountain routes regularly\u003c\/li\u003e\n\u003cli\u003eWant to reduce how often you charge your SY25-II e-bike battery\u003c\/li\u003e\n\u003cli\u003eNeed stronger, more consistent power output on challenging terrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Replace Your SY25-II Mountain E-Bike Battery?\u003c\/h2\u003e\n\u003cp\u003eReplace your SY25-II electric bike battery immediately if you notice:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNoticeably reduced range on your SY25-II Mountain Electric Bike\u003c\/li\u003e\n\u003cli\u003eSlower acceleration or reduced assist power on climbs\u003c\/li\u003e\n\u003cli\u003eBattery draining significantly faster than usual on your SY25-II\u003c\/li\u003e\n\u003cli\u003eE-bike cutting out unexpectedly during SY25-II mountain rides\u003c\/li\u003e\n\u003cli\u003eBattery no longer holding a full charge on your SY25-II electric bike\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAdvanced 30A BMS, Full Battery Protection\u003c\/h2\u003e\n\u003cp\u003eBoth the 13Ah and 15.6Ah versions include a full intelligent 30A Battery Management System:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercharge protection\u003c\/strong\u003e — automatically stops charging when SY25-II battery is full\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-discharge protection\u003c\/strong\u003e — prevents deep discharge damage to your e-bike battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercurrent protection\u003c\/strong\u003e — prevents damaging current surges to your SY25-II battery cells\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort circuit protection\u003c\/strong\u003e — keeps your SY25-II electric bike battery and wiring fully safe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverheat protection\u003c\/strong\u003e — monitors temperature to prevent heat damage during charging and riding\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable in 13Ah and 15.6Ah — choose the right capacity for your SY25-II e-bike\u003c\/li\u003e\n\u003cli\u003ePremium A+ grade 2600mAh EVE cells — outstanding lifespan and stable power output\u003c\/li\u003e\n\u003cli\u003e30A intelligent BMS — full multi-level protection for your SY25-II electric bike battery\u003c\/li\u003e\n\u003cli\u003eXT60 connector included as standard — plug and play fit for your SY25-II mountain e-bike\u003c\/li\u003e\n\u003cli\u003eWide motor compatibility — supports 200W to 750W motors (13Ah) and up to 1000W (15.6Ah)\u003c\/li\u003e\n\u003cli\u003eLED battery indicator — monitor real-time charge status during SY25-II e-bike rides\u003c\/li\u003e\n\u003cli\u003eAnti-theft lock — 2 keys included to secure battery to your SY25-II mountain bike frame\u003c\/li\u003e\n\u003cli\u003eUSB charging port — charge your phone or accessories on the go during SY25-II rides\u003c\/li\u003e\n\u003cli\u003eOn\/Off power switch — preserve charge when your SY25-II electric bike is not in use\u003c\/li\u003e\n\u003cli\u003eHailong-style durable casing — reinforced aluminium for impact resistance on mountain terrain\u003c\/li\u003e\n\u003cli\u003eUKCA, CE, UN38.3 and MSDS certified — fully compliant for UK e-bike use\u003c\/li\u003e\n\u003cli\u003eCharger included — 48V 3A powerful charger supplied with every SY25-II battery order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 36V Battery (13Ah or 15.6Ah) for SY25-II Mountain Electric Bike\u003c\/li\u003e\n\u003cli\u003e1 x 48V 3A Powerful Charger\u003c\/li\u003e\n\u003cli\u003e2 x Security Keys\u003c\/li\u003e\n\u003cli\u003e1 x 5-Pin Discharge Cable with Base (XT60 Connector — Default)\u003c\/li\u003e\n\u003cli\u003e1 x Mounting Plate \u003c\/li\u003e\n\u003cli\u003e1 x Instruction Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eConnector Information\u003c\/h2\u003e\n\u003cp\u003eComes with an \u003cstrong\u003eXT60 connector as standard\u003c\/strong\u003e ready to plug directly into your SY25-II Mountain Electric Bike without any adapter required. If you require an Anderson to XT90 adapter instead, please contact us before ordering and we can advise on the correct option for your setup.\u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAlways confirm your SY25-II Mountain Electric Bike uses a 36V battery system before purchasing\u003c\/li\u003e\n\u003cli\u003eSelect your preferred capacity — 13Ah or 15.6Ah — before adding to basket\u003c\/li\u003e\n\u003cli\u003eXT60 connector is supplied as standard.\u003c\/li\u003e\n\u003cli\u003eDo not expose battery to water, extreme heat, or direct sunlight during storage\u003c\/li\u003e\n\u003cli\u003eAlways charge in a well-ventilated area and never leave unattended while charging\u003c\/li\u003e\n\u003cli\u003eContact us for compatibility guidance before purchasing if unsure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e","brand":"Battery King","offers":[{"title":"36V 13Ah","offer_id":57245487497594,"sku":"EB-BT-HL-36V13AH-BK-BTRY","price":164.0,"currency_code":"GBP","in_stock":true},{"title":"36V 15.6Ah","offer_id":57245487530362,"sku":"EB-BT-HL-36V15.6AH-BK-BTRY","price":175.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0906\/4176\/0634\/files\/Cyrusher650-FirstImage.png?v=1788862906","url":"https:\/\/www.batteryking.co.uk\/products\/36v-battery-sy25-ii-mountain-electric-bike","provider":"Battery King","version":"1.0","type":"link"}